Tag Archives: CodeIgniter Disallowed Key Characters

Somewhere in the html form you simply missed the opening quote of input name attribute(s). Example <input type=”text” name=last_name“> Just find and use the right syntax for happy coding. You can find the code for tracking disallowed characters are in system/core/input.php file function _clean_input_keys($string) { if (! preg_match("/^[a-z0-9:_/-]+$/i", $string)) { exit('Disallowed Key Characters.+'. $string)); } return $string; }